sensors Mode-S transponder

4CC57B

ICAO 24-bit transponder address

Currently assigned to TF-ICT · BOEING 737 MAX 8

Hex
4CC57B
Octal
23142573
Decimal
5,031,291
Tail
TF-ICT
Type
B38M
No current signal · last broadcast 1d ago
Flights observed
8
Distinct callsigns
5
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4CC57B.

Callsign history 5 distinct

Callsign Airline Flights Last seen
ICE7EZ - 2 2026-04-13
ICE6EZ - 2 2026-04-13
ICE5000 - 2 2026-04-13
ICE581 Icelandair 1 2026-04-12
ICE11P Icelandair 1 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-13 ICE11P KEF → SEA Apr 13, 20:10 UTCApr 13, 22:55 UTC2h 45m
2026-04-13 ICE7EZ - Apr 13, 16:15 UTCApr 13, 18:30 UTC2h 15m
2026-04-13 ICE7EZ - Apr 13, 15:50 UTCApr 13, 16:15 UTC25m
2026-04-13 ICE6EZ - Apr 13, 12:35 UTCApr 13, 14:00 UTC1h 25m
2026-04-13 ICE6EZ - Apr 13, 11:10 UTCApr 13, 11:35 UTC25m
2026-04-13 ICE5000 - Apr 13, 08:55 UTCApr 13, 10:05 UTC1h 10m
2026-04-13 ICE5000 KEF → KEF Apr 13, 08:40 UTCApr 13, 08:50 UTC10m
2026-04-12 ICE581 TFS → KEF Apr 12, 17:15 UTCApr 12, 17:55 UTC40m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the TF-ICT page for operator, model, and routing details .

Mode-S 4CC57B frequently asked

What is Mode-S code 4CC57B?
4CC57B is an ICAO 24-bit transponder address. Assigned to TF-ICT.
Is 4CC57B broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC57B, octal 23142573, decimal 5,031,291.
What flights does 4CC57B operate?
Mode-S 4CC57B has broadcast 5 distinct callsigns, including ICE7EZ, ICE6EZ, ICE5000, ICE581, ICE11P.